Home / 80,741,417.09-120,934,946.15-66,749,800.91

Finding the Fourth Proportional to 80,741,417.09, 120,934,946.15 and 66,749,800.91

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Solution

The fourth proportional to 80,741,417.09, 120,934,946.15 and 66,749,800.91 is: 99,978,225.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,741,417.09 : 120,934,946.15 = 66,749,800.91 : x
  2. Step 2: Convert to fraction form
    80,741,417.09/120,934,946.15 = 66,749,800.91/x
  3. Step 3: Cross multiply
    80,741,417.09x = 120,934,946.15 × 66,749,800.91
  4. Step 4: Simplify right side
    80,741,417.09x = 8,072,383,578,136,271
  5. Step 5: Solve for x
    x = 8,072,383,578,136,271/80,741,417.09
  6. Step 6: Final answer
    x = 99,978,225.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.